CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities
Net income (loss)	$ 12,928	$ 7,774
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	83,168	53,354
Derivative contracts:
Net losses	54,414	71,036
Cash settlements, net	(3,907)	(19,977)
Deferred income tax expense	2,030	163
Gain on sales of assets, net	(41)	(79)
Non-cash interest expense	1,748	1,644
Share-based compensation (equity-classified)	2,055	2,451
Other, net	26	26
Changes in operating assets and liabilities, net	1,941	4,026
Net cash provided by operating activities	154,362	120,418
Cash flows from investing activities
Acquisitions, net	0	(86,835)
Capital expenditures	(175,941)	(201,350)
Proceeds from sales of assets, net	29	2,525
Net cash used in investing activities	(175,912)	(285,660)
Cash flows from financing activities
Proceeds from credit facility borrowings	32,000	166,500
Repayment of credit facility borrowings	(13,000)	0
Debt issuance costs paid	(2,518)	(754)
Net cash provided by financing activities	16,482	165,746
Net increase (decrease) in cash and cash equivalents	(5,068)	504
Cash and cash equivalents – beginning of period	17,864	11,017
Cash and cash equivalents – end of period	12,796	11,521
Cash paid for:
Interest, net of amounts capitalized	16,784	8,953
Reorganization items, net	79	442
Non-cash investing and financing activities:
Changes in accounts receivable related to acquisitions	0	(26,631)
Changes in other assets related to acquisitions	0	(2,469)
Changes in accrued liabilities related to acquisitions	0	(15,099)
Changes in accrued liabilities related to capital expenditures	17,397	12,231
Changes in other liabilities for asset retirement obligations related to acquisitions	$ 0	$ 382